Origin

seethe(FEEL ANGER)Show phoneticsverb[I]to feel very angry but to be unable or unwilling to express it clearly:The class positively seethed with indignation when Julia won the award.By the end of the meeting he was seething.
verb [no object]

1(of a liquid) boil or be turbulent as if boiling:the grey ocean seethed

[with object] archaic cook (food) by boiling it in a liquid:others were cut into joints and seethed in cauldrons made of the animal’s own skins

2(of a person) be filled with intense but unexpressed anger:inwardly he was seething at the slight to his authority

3(of a place) be crowded with people or things moving about in a rapid or hectic way:the entire cellar was seething with spiders

[with adverbial of direction] (of a crowd of people) move in a rapid or hectic way:we cascaded down the stairs and seethed across the station (as adjective seething)the seething mass of commuters

Derivatives

seethinglyadverb

Origin:

Old Englishsēothan 'make or keep boiling', of Germanic origin; related to Dutch zieden

seethingadjective[before noun]Their seething resentment led to angry jostling between team-mates.